JMI era VOX - Top Boost Unit layout

[Turret]

Good day TAG

Here's Top Boost Unit layout I just completed

Have fun

[jodie]

Hi,
this is an old topic I know...
The link does not work anymore, does anyone still have this layout?
Thanks
Jodie

[pompeiisneaks]

The site's gone, but someone tried rescuing it:

http://turretboard.knucklehead.dk/

but I don't see that specific layout sadly.

~Phil

[jodie]

Hi Phil,
what a pity, but thanks anyway!

stay healthy all of you
Jodie

[Alnico]

I can upload photos of my original TB unit, if that's any help. Don't have time to draw it out, sorry...

[jodie]

Hi,
yes, please upload!
Thanks
Jodie

[pdf64]

Bingo, back in 2018 I installed a top boost kit from a guy on ebay, into a friend's AC30.
It came with the following documentation, including high quality print of the turretboards layout.
I found that it was better with C1 the cathode bypass omitted; with it, system gain seemed excessive, too little clean range on the vol control, high settings of vol and treble tended to oscillation.
https://ibb.co/3zRjTs7
https://m.imgur.com/gallery/Vmpfu9l

topboost.jpeg

Here’s a snippet of the integral top boost layout, from Stephen Grosvenor’s excellent book https://www.thevoxac30guide.com//
https://ibb.co/bbgCgyZ

[jodie]

Yes, this really helps.
I´ll also try leaving out the cathode bypass cap.
Thanks a lot

[jodie]

... Stephen Grosvenor´s book really is great

[Alnico]

Looks like you've got it covered, but here are the photos.

[jodie]

Wow, the real thing!
Now I got everything I wanted,
thanks a lot!

Jodie

[LuciMan]

... Stephen Grosvenor´s book really is great

Yes - it is!
In addition to turret's/torg's layouts of AC15 & 30 & TB it was the main source to my AC4 to AC30 clones buildings 5 years ago as you can see on the wall behind my working place (first pic - fortunately I found the thread via webarchive link): Surrounded by Clones